Programming Language and compiler
Benchmarks

C VS Java benchmarks

Current benchmark data was generated on Mon May 19 2025, full log can be found HERE

CONTRIBUTIONS are WELCOME!

[x86_64][4 cores] AMD EPYC 7763 64-Core Processor (Model 1)

* -m in a file name stands for multi-threading or multi-processing

* -i in a file name stands for direct intrinsics usage. (Usage of simd intrinsics via libraries is not counted)

* -ffi in a file name stands for non-stdlib FFI usage

* (You may find time < time(user) + time(sys) for some non-parallelized programs, the overhead is from GC or JIT compiler, which are allowed to take advantage of multi-cores as that's more close to real-world scenarios.)

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 0.9ms 0.0ms 1.4MB 0ms 0ms zigcc 0.14.0
c 1.c 1.2ms 0.1ms 2.1MB 0ms 0ms gcc 15.1.0
c 1.c 1.3ms 0.0ms 2.1MB 0ms 0ms clang 14.0.0-1ubuntu1.1
java 1.java 65ms 2.3ms 53.1MB 68ms 20ms graal/jvm 17.0.8
java 1.java 70ms 6.5ms 44.7MB 80ms 14ms openjdk 23
java 1.java 70ms 4.4ms 43.9MB 76ms 18ms openjdk 21
java 1.java 194ms 7.5ms 43.0MB 86ms 142ms openjdk/zgc 21

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 171ms 2.2ms 23.3MB 400ms 10ms gcc 15.1.0
c 1-m.c 304ms 9.4ms 25.6MB 1047ms 27ms clang 14.0.0-1ubuntu1.1
java 3-m.java 1066ms 62ms 154.5MB 3653ms 53ms openjdk 23
java 3-m.java 1090ms 16ms 125.0MB 3730ms 50ms openjdk 21
java 3-m.java 1113ms 11ms 179.2MB 3827ms 60ms graal/jvm 17.0.8
java 3-m.java 1376ms 12ms 179.0MB 4323ms 207ms openjdk/zgc 21

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-m.c 28ms 0.6ms 12.9MB 60ms 0ms gcc 15.1.0
c 1-m.c 38ms 1.4ms 14.9MB 110ms 0ms clang 14.0.0-1ubuntu1.1
java 3-m.java 327ms 29ms 99.7MB 970ms 37ms openjdk 21
java 3-m.java 336ms 17ms 104.1MB 997ms 37ms openjdk 23
java 3-m.java 347ms 30ms 135.3MB 967ms 57ms graal/jvm 17.0.8
java 3-m.java 440ms 9.5ms 98.5MB 930ms 167ms openjdk/zgc 21

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-mffi.c 211ms 5.6ms 7.5MB 787ms 13ms clang 14.0.0-1ubuntu1.1
c 1-mffi.c 270ms 9.6ms 6.6MB 820ms 0ms gcc 15.1.0
c 1-mffi.c 329ms 0.2ms 6.0MB 320ms 0ms zigcc 0.14.0
c 1-ffi.c 331ms 2.0ms 6.0MB 320ms 0ms zigcc 0.14.0
c 1-ffi.c 460ms 4.3ms 6.7MB 447ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 542ms 0.1ms 6.8MB 530ms 0ms gcc 15.1.0
java 1b.java 1150ms 9.6ms 55.1MB 1253ms 17ms openjdk 23
java 1b.java 1165ms 24ms 54.5MB 1277ms 20ms openjdk 21
java 1b.java 1185ms 21ms 110.0MB 1397ms 40ms graal/jvm 17.0.8
java 1.java 1259ms 14ms 133.7MB 1377ms 50ms graal/jvm 17.0.8
java 1b.java 1282ms 17ms 51.0MB 1270ms 143ms openjdk/zgc 21
java 1a.java 1658ms 5.0ms 55.8MB 1757ms 27ms openjdk 23
java 1a.java 1665ms 7.5ms 55.0MB 1773ms 17ms openjdk 21
java 1a.java 1696ms 7.7ms 102.1MB 1813ms 43ms graal/jvm 17.0.8
java 1.java 1710ms 5.3ms 266.5MB 1773ms 47ms openjdk 21
java 1.java 1716ms 3.0ms 317.2MB 1780ms 53ms openjdk 23
java 1a.java 1786ms 3.6ms 52.1MB 1770ms 140ms openjdk/zgc 21
java 1.java 2371ms 11ms 852.6MB 1813ms 670ms openjdk/zgc 21
java 2.java timeout 0.0ms 707.1MB 5343ms 120ms openjdk 21
java 2.java timeout 0.0ms 756.4MB 5333ms 133ms openjdk 23
java 2.java timeout 0.0ms 3298.5MB 3430ms 1950ms openjdk/zgc 21

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-mffi.c 15ms 0.3ms 4.6MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 16ms 0.4ms 3.0MB 10ms 0ms zigcc 0.14.0
c 1-mffi.c 16ms 0.2ms 3.0MB 10ms 0ms zigcc 0.14.0
c 1-mffi.c 18ms 2.4ms 3.8MB 47ms 0ms gcc 15.1.0
c 1-ffi.c 22ms 0.4ms 3.8MB 13ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 26ms 1.0ms 3.6MB 20ms 0ms gcc 15.1.0
java 1b-m.java 183ms 6.1ms 49.6MB 290ms 27ms openjdk 21
java 1b-m.java 186ms 5.5ms 51.5MB 297ms 20ms openjdk 23
java 1a-m.java 191ms 4.9ms 50.8MB 290ms 23ms openjdk 21
java 1a-m.java 193ms 3.0ms 52.9MB 290ms 23ms openjdk 23
java 1-m.java 197ms 3.9ms 87.1MB 273ms 30ms openjdk 23
java 1-m.java 198ms 3.0ms 81.7MB 280ms 23ms openjdk 21
java 1-m.java 201ms 9.5ms 112.5MB 310ms 43ms graal/jvm 17.0.8
java 1a-m.java 208ms 1.3ms 98.4MB 320ms 33ms graal/jvm 17.0.8
java 1b-m.java 226ms 12ms 100.1MB 390ms 37ms graal/jvm 17.0.8
java 1b.java 307ms 6.4ms 47.4MB 300ms 140ms openjdk/zgc 21
java 1a.java 319ms 1.1ms 48.9MB 300ms 147ms openjdk/zgc 21
java 1.java 337ms 3.1ms 114.3MB 260ms 163ms openjdk/zgc 21
java 2-m.java 560ms 7.9ms 661.3MB 860ms 100ms openjdk 21
java 2-m.java 587ms 3.2ms 785.9MB 887ms 97ms openjdk 23
java 2.java 1620ms 55ms 1396.0MB 853ms 1077ms openjdk/zgc 21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 266ms 0.1ms 1.5MB 260ms 0ms zigcc 0.14.0
c 8-i.c 301ms 2.3ms 2.1MB 290ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 308ms 0.2ms 2.3MB 300ms 0ms gcc 15.1.0
c 5.c 313ms 0.9ms 2.3MB 300ms 0ms gcc 15.1.0
c 2.c 315ms 2.1ms 1.5MB 307ms 0ms zigcc 0.14.0
c 5.c 316ms 0.9ms 1.5MB 310ms 0ms zigcc 0.14.0
c 5.c 317ms 1.4ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 320ms 3.6ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 337ms 0.3ms 2.3MB 330ms 0ms gcc 15.1.0
java 1.java 445ms 0.4ms 45.0MB 490ms 13ms openjdk 21
java 1.java 446ms 3.8ms 48.4MB 477ms 20ms openjdk 23
java 1.java 447ms 2.3ms 82.2MB 477ms 27ms graal/jvm 17.0.8
java 1.java 577ms 2.1ms 44.8MB 497ms 140ms openjdk/zgc 21
java 2.java 1252ms 5.6ms 639.9MB 1390ms 87ms openjdk 21
java 2.java 1277ms 19ms 794.0MB 1390ms 113ms openjdk 23
java 2.java 3274ms 53ms 2445.6MB 1653ms 1830ms openjdk/zgc 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 29ms 0.6ms 1.5MB 20ms 0ms zigcc 0.14.0
c 8-i.c 33ms 0.7ms 2.1MB 23ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 33ms 0.4ms 2.3MB 30ms 0ms gcc 15.1.0
c 5.c 33ms 0.1ms 2.3MB 27ms 0ms gcc 15.1.0
c 5.c 34ms 0.4ms 2.1MB 27ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 34ms 1.0ms 1.5MB 30ms 0ms zigcc 0.14.0
c 5.c 34ms 0.7ms 1.5MB 30ms 0ms zigcc 0.14.0
c 8-i.c 36ms 0.4ms 2.3MB 30ms 0ms gcc 15.1.0
c 2.c 38ms 2.0ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
java 1.java 120ms 4.0ms 48.0MB 153ms 20ms openjdk 23
java 1.java 122ms 2.1ms 44.9MB 167ms 13ms openjdk 21
java 1-m.java 123ms 4.2ms 81.5MB 157ms 33ms graal/jvm 17.0.8
java 1.java 249ms 3.8ms 44.9MB 157ms 147ms openjdk/zgc 21
java 2-m.java 302ms 22ms 344.8MB 437ms 53ms openjdk 21
java 2-m.java 313ms 7.2ms 400.0MB 443ms 70ms openjdk 23
java 2.java 684ms 17ms 532.7MB 467ms 407ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 282ms 11ms 40.9MB 263ms 0ms gcc 15.1.0
c 1.c 303ms 3.8ms 40.8MB 287ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 307ms 13ms 40.3MB 290ms 0ms zigcc 0.14.0
java 1.java 410ms 3.5ms 115.8MB 463ms 27ms openjdk 21
java 1.java 424ms 3.9ms 118.5MB 467ms 27ms openjdk 23
java 1.java 587ms 6.0ms 112.8MB 493ms 163ms openjdk/zgc 21
java 1-m.java 644ms 25ms 236.7MB 933ms 77ms graal/jvm 17.0.8
java 2.java 782ms 3.1ms 56.9MB 837ms 17ms openjdk 21
java 2.java 786ms 9.6ms 60.5MB 840ms 20ms openjdk 23
java 2.java 847ms 3.9ms 53.2MB 777ms 143ms openjdk/zgc 21
java 2-m.java 1339ms 8.3ms 234.5MB 2410ms 100ms graal/jvm 17.0.8

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 52ms 2.8ms 11.8MB 40ms 0ms gcc 15.1.0
c 1.c 53ms 2.1ms 11.7MB 40ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 58ms 3.4ms 11.0MB 47ms 0ms zigcc 0.14.0
java 1.java 155ms 2.3ms 68.1MB 200ms 23ms openjdk 23
java 1.java 158ms 3.5ms 64.7MB 210ms 20ms openjdk 21
java 1-m.java 210ms 6.9ms 124.8MB 297ms 47ms graal/jvm 17.0.8
java 2.java 262ms 3.1ms 50.5MB 310ms 23ms openjdk 23
java 2.java 263ms 1.2ms 50.0MB 327ms 20ms openjdk 21
java 1.java 286ms 4.1ms 61.5MB 203ms 150ms openjdk/zgc 21
java 2.java 370ms 2.8ms 47.7MB 303ms 147ms openjdk/zgc 21
java 2-m.java 470ms 6.2ms 199.2MB 830ms 63ms graal/jvm 17.0.8

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 3-m.c 736ms 1.0ms 2.3MB 2893ms 0ms gcc 15.1.0
c 6-im.c 952ms 1.7ms 2.0MB 3753ms 0ms gcc 15.1.0
c 4-m.c 989ms 1.3ms 2.1MB 3890ms 0ms gcc 15.1.0
c 6-im.c 1001ms 0.7ms 3.1MB 3933ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 1118ms 0.5ms 3.3MB 4400ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1174ms 26ms 2.3MB 4553ms 0ms gcc 15.1.0
c 5-im.c 1341ms 14ms 3.3MB 5260ms 3ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1846ms 16ms 3.3MB 7243ms 10ms clang 14.0.0-1ubuntu1.1
java 2-m.java 1987ms 7.3ms 47.4MB 7587ms 27ms openjdk 21
java 2-m.java 2001ms 11ms 48.8MB 7653ms 27ms openjdk 23
java 2-m.java 2120ms 12ms 45.2MB 7633ms 150ms openjdk/zgc 21
java 2-m.java 2521ms 48ms 94.9MB 9407ms 50ms graal/jvm 17.0.8

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 3-m.c 195ms 2.3ms 2.0MB 737ms 0ms gcc 15.1.0
c 6-im.c 246ms 1.4ms 2.0MB 947ms 0ms gcc 15.1.0
c 6-im.c 258ms 0.3ms 3.4MB 987ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 259ms 0.8ms 2.1MB 993ms 0ms gcc 15.1.0
c 4-m.c 289ms 1.6ms 3.3MB 1107ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 298ms 7.8ms 2.0MB 1143ms 0ms gcc 15.1.0
c 5-im.c 340ms 1.4ms 3.3MB 1310ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 466ms 4.2ms 3.4MB 1800ms 0ms clang 14.0.0-1ubuntu1.1
java 2-m.java 605ms 4.2ms 47.7MB 2140ms 20ms openjdk 21
java 2-m.java 617ms 2.8ms 48.8MB 2187ms 20ms openjdk 23
java 2-m.java 732ms 8.1ms 45.3MB 2153ms 147ms openjdk/zgc 21
java 2-m.java 776ms 4.7ms 95.1MB 2737ms 43ms graal/jvm 17.0.8

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 3-m.c 57ms 1.9ms 2.3MB 193ms 0ms gcc 15.1.0
c 6-im.c 72ms 3.1ms 3.4MB 250ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 73ms 0.8ms 2.0MB 260ms 0ms gcc 15.1.0
c 6-im.c 73ms 7.6ms 2.0MB 260ms 0ms gcc 15.1.0
c 4-m.c 78ms 1.0ms 3.1MB 277ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 81ms 0.3ms 2.0MB 290ms 0ms gcc 15.1.0
c 5-im.c 92ms 0.5ms 3.1MB 330ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 124ms 1.7ms 3.3MB 457ms 0ms clang 14.0.0-1ubuntu1.1
java 2-m.java 248ms 5.2ms 47.7MB 723ms 20ms openjdk 21
java 2-m.java 267ms 4.0ms 48.4MB 787ms 20ms openjdk 23
java 2-m.java 323ms 9.1ms 94.0MB 987ms 43ms graal/jvm 17.0.8
java 2-m.java 387ms 8.0ms 45.5MB 783ms 147ms openjdk/zgc 21